Results 21 to 30 of about 1,212 (176)
Energy Science & Engineering, 2021 This experimental study evaluates the energy performance and climatic changes of a cascade cooling system operating with the R134a/R744 pairs (cooling capacity of 4.5‐6 kW) and R438A/R744.
Marcus Vinícius Almeida Queiroz +6 more
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Speed of sound in liquid R134a
International Journal of Refrigeration, 1992 Abstract The speed of sound for liquid R134a (1,1,1,2-tetrafluoroethane) has been measured along isotherms at temperatures from close to the triplee point to above the critical temperature (180–380 K) at pressures from near saturation to 70 MPa. The measurements were made by using a pulse-echo-overlap technique at 3 MHz.
Henrique J.R Guedes, John A Zollweg
openaire +1 more source
European Mechanical ScienceThe increasing environmental disasters in recent years are caused by the release of artificial substances into the environment. The majority of artificial-containing emissions originate from petrochemical products.
Alpaslan Alkan
doaj +1 more source
Ain Shams Engineering Journal, 2018 Due to the European Communities motor vehicle directive (2006) refrigerants with a GWP higher than 150 are not allowed from January 1, 2017 in new passenger cars. Thus, a replacement for R134a is needed.
Gaurav, Raj Kumar
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Exergy Analysis of Tita nium Dioxide (TiO2) Suspended with R290/R600 as a Substitute for R134a [PDF]
Archives of Metallurgy and MaterialsSynthetic refrigerants are being phased out gradually in accordance with international environmental protection protocols because of global warming and ozone layer depletion.
D.M. Madyira, T.O. Babarinde
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FILM –WISE CONDENSATION OF R1234yf AND R134a REFRIGERANTS ON FINNED TUBE WITH 32 FINS PER INCH
Wasit Journal of Engineering Sciences, 2022 Researchers have been motivating by the global warming challenge to develop alternatives substances to compounds that contribute to this problem. The refrigerant R134a (HFC134a) has been identified as one of the most environmentally damaging gases. As a
Jasim Khalid, Alaa R. Al-Badry
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Analysis of R134a Organic Regenerative Cycle
Journal of Power and Energy Engineering, 2020 The analysis of organic regenerative cycles is necessary to verify the possibilities of increasing the work and efficiency of a thermodynamic cycle according to some control parameters. The results obtained from this work can be beneficial in several areas such as solar thermal energy.
André Felippe Vieira da Cunha +1 more
openaire +2 more sources
Experimental and Theoretical Investigation of Propane/Butane and Propane/Isobutane Mixtures as an Alternative to R134a in a Domestic Refrigerator [PDF]
Engineering and Technology Journal, 2014 In the present work, theoretical and experimental investigation have been carried out with two hydrocarbon refrigerant mixtures as a possible alternatives to R134a. Theoretical performance of an ideal vapor compression refrigeration cycle using R290/R600
Wahid S. Mohammad, Assad Oda Jassim
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Environmental Progress &Sustainable Energy, EarlyView.Abstract Brazed plate heat exchanger (BPHE) was analyzed using computational fluid dynamics (CFD) simulations by ANSYS Fluent to investigate the chevron‐patterned plates. The influence of geometric parameters, including corrugation pitch, depth, and angle was analyzed.
J. S. Huang, K. B. Then, X. W. Wang
wiley +1 more source
Enhancing VCRS performance A study of R134a and refrigerant blends with spiral condensers and series
Journal of Thermal EngineeringThe purpose of this work will be the improve the vapour compression refrigeration system, taking into account the usage of environmentally friendly refrigerants.
Sourabh KULKARNI +2 more
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